let's suppose it's still good then check the wiring.. also disconnect it and start the engine to see if there's any change.. if none then the sensor is bad or not reacting on mine when I disconnect it, it idles bad, running rich till the coolant temp is up... the sensor could be still good but covered with a layer of deposit that makes it less sensitive to heat and then it requires more heat to make it work - mine was like that but I replace it anyway because it's the same amount of work once removed. |
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